Temperature effects in tuning fork enhanced interferometric photoacoustic spectroscopy | Zendy

Michael Köhring | Zendy; S. Böttger | Zendy; Ulrike Willer | Zendy; Wolfgang Schade | Zendy

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Temperature effects in tuning fork enhanced interferometric photoacoustic spectroscopy

Author(s) -

Michael Köhring,

S. Böttger,

Ulrike Willer,

Wolfgang Schade

Publication year - 2013

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.21.020911

Subject(s) - tuning fork , resonator , photoacoustic spectroscopy , materials science , optics , interferometry , spectroscopy , multiphysics , silicon , optoelectronics , laser , finite element method , acoustics , vibration , physics , quantum mechanics , thermodynamics

Temperature dependent measurements with a compact fiber coupled sensor for trace gas detection in the near-infrared based on tuning fork enhanced interferometric photoacoustic spectroscopy are presented. The temperature effects on the sensor have been investigated in a range from T = -41 °C to T = 107 °C, in particular the influence on the resonance frequency and the Q-factor of the micro tuning fork. The refined sensor head contains a combination of a silicon tuning fork and an acoustic off-beam resonator and permits methane detection with a detection limit of S = (3.85 ± 0.01) ppm. The functional capability of a numerical model for the optimization of acoustic off-beam resonators in COMSOL Multiphysics® is presented.

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